<template>
    <el-container class="home-container">
        <el-header>
            <div>
                <img src="../assets/heima.png" />
                <span>电商后台管理系统</span>
            </div>
            <el-button type="info" @click="logout">退出</el-button></el-header
        >
        <el-container>
            <el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
                <el-menu
                    class="el-menu-vertical-demo"
                    background-color="#545c64"
                    text-color="#fff"
                    active-text-color="#409eff"
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    :default-active="activePath"
                    unique-opened
                    router
                >
                    <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
                        <template slot="title">
                            <i :class="iconsObj[item.id]"></i>
                            <span>{{ item.authName }}</span>
                        </template>

                        <el-menu-item
                            :index="'/' + subItem.path"
                            v-for="subItem in item.children"
                            :key="subItem.id"
                            @click="saveNavState('/' + subItem.path)"
                        >
                            <i class="el-icon-menu"></i>
                            <span>{{ subItem.authName }}</span>
                        </el-menu-item>
                    </el-submenu>
                </el-menu>
            </el-aside>
            <el-main><router-view></router-view></el-main>
        </el-container>
    </el-container>
</template>

<script>
export default {
    data() {
        return {
            menuList: [],
            iconsObj: {
                '125': 'iconfont icon-user',
                '103': 'iconfont icon-tijikongjian',
                '101': 'iconfont icon-shangpin',
                '102': 'iconfont icon-danju',
                '145': 'iconfont icon-baobiao'
            },
            isCollapse: false,
            activePath: '' // 被激活的链接地址
        }
    },
    methods: {
        logout() {
            window.sessionStorage.clear()
            this.$router.push('/login')
        },
        async getMenuList() {
            const { data: res } = await this.$http.get('menus')
            if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
            this.menuList = res.data
        },
        toggleCollapse() {
            // 点击按钮切换菜单的折叠与展开
            this.isCollapse = !this.isCollapse
        },
        saveNavState(path) {
            sessionStorage.setItem('activePath', path)
            this.activePath = path
        }
    },
    created() {
        this.getMenuList()
        this.activePath = sessionStorage.getItem('activePath')
    }
}
</script>

<style lang="less" scoped>
.home-container {
    height: 100%;
}
.el-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-left: 0;
    background-color: #373d41;
    color: #fff;
    font-size: 20px;
    div {
        display: flex;
        justify-content: flex-start;
        align-items: center;
        span {
            margin-left: 15px;
        }
    }
}
.el-aside {
    background-color: #333744;
}
.el-main {
    background-color: #eeeeee;
}
.iconfont {
    margin-right: 10px;
}
.el-menu {
    border-right: 0;
}
.toggle-button {
    background-color: #4a5064;
    font-size: 10px;
    line-height: 24px;
    color: white;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
